You're kidding right?Tapeworm said:Incorrect. Given that cranks are fixed to each other (unless you are using powercranks or the like) the weight of the leg on one side balances the other leg. Almost the prefect counterweight*, ie: all the power driving the crank is driving the crank unless you are actively pushing on the upstroke (which usually does not happen). There is no "lifting" of the opposite leg.
The mass of the legs must be moved no matter the counterweight. I'm not going to give you a physics lesson but you even fail to take gravity into account. The weight of the legs make as much difference to the equation as the weight of the wheels and every other moving part. The most basic rules of physics dictate that the energy required to move an .... you know what, I'm not even going to bother giving you the math, I suspect you're an art student with a comment like that. Sheesh.